JPS62295695A - Cloth drier and method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION 3. DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION This invention relates generally to clothes drying apparatus, such as, for example, commercial dryers used in self-service washing machines.

Prior Art In conventional drying 9, heated air is pumped through a rotating drum to evaporate moisture from the wet garments that are being transferred within the drum. Air exhausted from the drum is directed through one or a series of ducts to an exhaust outlet.

Also, in order to save energy, many conventional '/eN
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lri #1i - Incorporates a duct Y for circulating circulation. However, drying time limits the amount of moist air that can be circulated. Accordingly, both commercial and domestic dryers have limited the amount of air circulated to no more than 60% of the amount of air entering the drum.

To further save energy, various systems have been used to transfer heat from the exhaust air to heat the water entering the washing machine. For example, US Patent i4,27
No. 5,510 describes a heat pipe connected between the exhaust air of a dryer and the water supply of a water heater to preheat the water. U.S. Pat. No. 4,412,391 describes a heating chamber positioned below a conventional hot water tank and connected to a dryer outlet to preheat the wash water.

Problems to be Solved by the Invention However, the conventional drying apparatus as described above can only preheat water. However, because the temperature difference between the dryer exhaust air and the water supply was relatively low, the water could not be heated to the normal temperature of the water supply.

Another problem lies in the recovery of heat from the dry grass, where the combustion gas from the gas burner goes into Kuriiso. For example, combustion gases such as hydrogen chloride, carbon dioxide, nitrogen dioxide, and hydrogen fluoride combine with water vapor condensate to form chloride, carbonic acid, nitric acid, and hydrofluoric acid, respectively. These acids can corrode the heat exchanger connected to the dryer exhaust.

Traditional methods of drying clothes and recovering heat also have one drawback. That is, the ducting required to exhaust and circulate air adds to the size, complexity, and thermal mass of the dryer. The increased thermal mass prolongs the warm-up time, reduces drying efficiency, and dissipates exhaust gas that could otherwise be recovered.

SUMMARY OF THE INVENTION The present invention provides a drum having a perforated circumferential wall and a drum air inlet, the drum having a perforated circumferential wall and a drum air inlet, and comprising both said circumferential wall and a rear portion. A circulation passageway with
means for moving air into the air inlet of the drum and discharging the air through the holes, the moving means also drawing a portion of the discharged air through the circulation passageway and into the air inlet of the drum. The aforementioned problems and drawbacks are overcome by providing a drying device. By circulating large amounts of air, the water vapor content of the air increases considerably. Therefore, the energy per unit amount of air that can be recovered through the condensing heat exchanger is increased appreciably.

The invention further provides a garment drum having an opening for receiving garments, a front opening communicating with said opening for receiving garments, a cabinet having a rear portion including an air inlet for the drum and a perforated circumferential wall; means for rotating; a housing spaced from and enclosing the rear circumferential wall and the circumferential wall of the drum; A circular air inlet connected to the air circulation path, a circumferential air inlet connected to the circulation path, and an air inlet of the drum are positioned to force air into the drum and exhaust it radially through perforations in the drum to remove a portion of the exhausted air. A fan that draws ambient air longitudinally through the circulation path back to the drum air inlet and from the ambient air inlet to the drum inlet, and a heater positioned in the circulation path to heat the air that is ultimately drawn into the drum inlet. To provide a clothes drying device comprising a drum and an exhaust prower connected to an exhaust outlet and exhausting air from a drum by drawing the remainder of the exhausted air from a circulation path to the exhaust outlet. The air drawn by the exhaust prower can be varied by varying the proportion of the exhausted air that is circulated back to the air inlet of the drum. The lower the proportion of air exhausted, the faster the drying time. The higher the ratio, the higher the water vapor content of the exhaust gas and therefore the more energy per unit amount of exhaust gas that can be recovered in the condensing heat exchanger. Preferably, the dryer further includes a condensing heat exchanger including a chamber and a tube connected to the exhaust blower and a finned heat exchanger positioned within the chamber, the fins being positioned generally vertically within the chamber, the fins being positioned generally vertically within the chamber, and the exhaust air flowing through the fins. The water flows upward along the pipe, forming a downward flow path, and the heated water passes through the pipe and condenses almost downward.It is heated by heat transfer with the condensation heat released by a part of the exhaust gas, and the condensate is heated by the heat of condensation released by the exhaust gas. It flows along the fin in almost the opposite direction. The downward flowing condensate flushes away the acidic condensate which could otherwise corrode the heat exchanger. The downward flowing condensate also sweeps clothing lint away from the heat exchanger. The condensing heat exchanger in this case cools the exhaust gas sufficiently to condense it.

Embodiment Referring to FIGS. 1 and 2, a drying apparatus 10 (hereinafter referred to as a dryer) for painting industry according to the present invention is shown. The dryer 10 includes a rotating clothes drum 12 having a generally cylindrical wall 14 and a rear drum wall 16.

Circumferential wall 14 includes a drum exit hole or hole 18. The rear ridge 16 contains the drum air inlet 20.

The airtight casing or drive compartment 22 is attached to the drum 1.
2 walls 14.16. Is a trickle fan 24 or other suitable air moving means used to clean the drum? n
It is moved across the inner Rt haka clothes of fa group cash on delivery duram 19F 7 and discharged in the radial direction through hole 18. A portion of the air exhausted from the holes 18 is drawn back longitudinally between the circumferential wall 14 and the casing 22 by a fan 24 and circulated back to the drum 12 through the drum air inlet 202. In the specific example shown, hole 1
More than 80% of the air discharged through the drum inlet 2
It is cycled back to 0.

Continuing the explanation of FIG. 1, the dryer 10 is similar to the dryer 2.
It is shown stacked on top of 6. For reasons discussed below, dryer 10 is compact enough to allow a pair of dryers to be stacked in the same space required for one of the conventional dryers. The dryer 26 is substantially similar to the dryer IO except that its control panel 28 is integrated with the dryer 100 control panel 30, thereby raising the control panel 28 above ground level for the convenience of the user. The structure is similar.

Dry Tr! The AlO includes an exterior cabinet 32 having side walls 34, a ceiling 36, a front wall 42, a bottom wall 38 (FIG. 2), and a back wall 40 (FIG. 2). Front wall 42 includes a housing circular flange 41 with a circular opening (FIG. 2).

Control panel 30 and air inlet 31 are connected to front wall 42 . Recessed glass plate 46, outer seal 48. 1 ton inside
A door 44 having a seal 50 and a handle 52 is attached to the front wall 42 by a conventional hinge assembly 54. The outer seal 48 and the inner seal 50 are connected to the door 4.
When 4 is in the closed position, the front wall 42 and the 7 flange 41 are pressed against each other to form a substantially airtight seal.

Control panel 30 supports user operated controls including a timer 192, a start button 194 and a coin purse slot 196χ. These controls are positioned behind the control panel 30 shown in FIG. Controller 190 controls various components of the dryer including ceramic ignition tip 282, gas valve 178, and motor 134 throughout the drying cycle.

Controller 190 is connected to a temperature sensor 198 (not shown) in the housing, preferably a thyristor, to maintain the drum air inlet temperature to thermocouple-controlled burner 70 in a conventional manner. For example, controls for user operation of conventional components of a dryer such as temperature selection, fabric selection, and safety ink locks can be connected to controller 190. However, these components are well known in the art and are not necessary for understanding the present invention, so they are not shown or described.

Referring now again to FIG. 2 to describe the dryer 10 in more detail, an open rectangular drying compartment or casing 22 encloses a top wall 58, a bottom wall 60, a rear chamber 62 and a drum 12. Side walls 64 spaced apart from each other (FIG. 5)
It is shown as having . The rear wall 62 is the exhaust outlet 6
6 and a shaft opening 68. Wall 58.60.
It is welded or attached to the front wall 42 of the 64fd cabinet 32 in a substantially airtight manner. The casing 22 thus communicates with the inlet hole 31, the door 44 and the exhaust outlet 66.

The drum 12 is cantilevered and concentrically positioned within the casing 22 by connecting the drum 12 and the drum shaft 90 to each other.

Axial fan 24 is positioned within drum air inlet 20 and connected to fan shaft 92 of drive shaft 94 . The drum air inlet 20 is surrounded by a baffle plate 72 to which a fan guard 96 is attached to prevent clothing from entering the fan. Axial lips 7o spaced at 120° are connected to the interior of the drum 12 to roll the garment in a conventional manner. The drum 12 and the casing 22 are placed together in a cabinet 32 to prevent the clothes from rolling around.
For example, 120e is positioned tilted downward.

For example, a cylindrical lint filter or screen 74, preferably made of a reticulated material that can withstand high temperatures without warping, such as stainless steel, is attached to the circumferential wall 14 and attached to the back wall of the drying compartment 22, such as stainless steel. The direction extends toward 62. As shown in detail in FIG.
It is attached to the offshore. Seal 76 is formed by a grooved ring 78, preferably made of a pliable, heat resistant material with low sliding abrasion, such as Teflon, between an inner concentric ring 82 and an outer concentric ring 84. It's stuck in between. A cylindrical extension 86, preferably made of Teflon, is attached to the screen 74 and extends from the groove into the grooved ring 78 of the seal 76. The exhaust outlet 66 is connected within the circumference of the seal 76 to the rear wall 62 of the compartment. Therefore, all air entering the drum air inlet 20 and air entering the exhaust outlet 66 is directed to the screen 74.
It will pass through. Furthermore, the screen 74 is free to rotate within the seal 76 as the drum 12 rotates.

A conventional ambient gas burner 170 is positioned above screen 74 and attached to compartment 220 top wall 58 by assembly 172. Shield 174 is burner 17
0 and seal 76 to prevent the Teflon material from warping at high temperatures. The burner 170 is electronically controlled and connected to the gas inlet pipe 176 by connecting a gas valve 178 and a pipe 180 to each other in series. The burner 1 is connected to the combination body 174 and the gas valve 178.
Ceramic ignition tip 1 positioned near 70
82 power printing 1j control circuit 190 (not shown).

With continued full reference to FIG. 2 and also to FIG. 6, top wall 10
0, bottom wall 102, side wall 104 (FIG. 6) and rear wall 10
An exhaust compartment 98 with 6 is shown. wall 100.10
2.104 is a nearly hermetically welded housing or attachment to the rear wall 62 of the drying compartment 22. The exhaust outlet 66 of the rear wall 62 and the flue outlet 108 of the rear wall 106 of the compartment 98 are connected to the casing 22.
Allow the exhaust air from the compartment 987al- to flow upwardly.

A condensing heat exchanger 110 having vertical fins 112 arranged in heat transfer relationship with horizontal tubes 114 is connected to the exhaust compartment 98.
vertically positioned within. Pipe 114 is Elport 1
16 are connected in series to each other and the room temperature water inlets 12
A downward zigdeg flow path is formed between the 0 and the hot water outlet.

Rear wall 106 of exhaust compartment 98 and rear wall 4 of cabinet 32
The distance between the motor compartment 124 and the motor compartment 124 is entirely defined. A pivot shaft 94 extends from a shaft opening 128 in the rear wall 106 through the shaft opening 126 of the heat exchanger 110 and the shaft opening 68 of the compartment 22 into the air inlet 20 of the drum. Bearing 13o.

132 are positioned over the shaft openings 68 and 128, respectively, and QKdnyahu)94? : Supports and prevents air from leaking from the shaft opening. , drive shaft 94
is an outer drum shaft 90 and an inner fan shaft 9 separated from each other by conventional means such as bearings (not shown).
2.

Figure 4 and Figure 2? As a reference, fan shaft 92 is connected to a variable speed electric motor 134 by a fan shaft sprocket 136, a motor sprocket 138, and a chain 140 that follows these sprockets from one another. The drum 12 has a beam 88 and a drum shaft 90
．． Drum shaft Boo'J-152, connect them to each other and the outside Boo! J-152, connected to electric motor 134 by belt 150 and motor pulley 142 connecting both pulleys together.

The (N air) lower 156 is connected to the electric @134 by a blower valve 1601, a fan shaft boolean IJ-162, and a belt 164 connecting them to each other.

A blower 156 is connected to the flue outlet 108 of the exhaust compartment 98 to draw exhaust air from the compartment.

The diameters of the pulleys and sprockets described above are conventionally selected to allow the fan 24 and blower 156 to achieve the desired air flow and rotate the drum 12 as desired. have.

Figure 2 and Figure 5 according to the above explanation? : With reference to this, the function of the dryer IO will be explained. The above-mentioned parameters relating to the rotation and temperature of the airflow drum) are meant to be illustrative and not limiting. Those skilled in the art will appreciate that the present invention can be used to advantage with a wide variety of parameters.

The user inserts a suitable coin into the hardening slot 196.
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1SIff Shizukuru! When the r←J-7Il mer 192 and start button 194 are activated, the control circuit 190 starts the igniter 1.
82, gas valve 178 and motor 134 are sequentially activated in a conventional manner well known to those skilled in the art. Control circuit 19
Burner 170 thermostatically controlled by
fire radially through the screen 74 to maintain the drum air inlet at a temperature of approximately 200°C below. Approximately 150 cfm of heated air is pumped by fan 24 into citrum 12 and over the clothing rolling therein. Approximately twice the flow rate of a conventional dryer flows over the clothes, carrying moisture and lint away from the clothes as it exits drum 12 radially through all perforations 18. To maintain the air flow rate through the perforations 18 at a low flow rate of about 6 fps, substantially the entire area of the circumferential wall 14 must be perforated.

Therefore, the total cross-sectional area through which the air is evacuated is extremely large, thereby doubling the air flow through the dryer and maintaining conventional exhaust rates. Otherwise, the air forced into the drum 12 would not have a high enough displacement to force the garment against the drum 12, thereby blocking the air flow through the drum and causing the garment to roll around within the drum 12. interfere with

Fan 24 also draws air exhausted from perforations 18 longitudinally between circumferential wall 14 and compartment 22 and back radially through screen 74.

Lint carried by the discharged air is deposited on the screen 74 as the air passes through the screen 74. At the same time, exhaust prower 156 draws approximately 100 cfm of exhaust air through screen 74 into exhaust outlet 66 . Therefore, the remaining 1400 of the exhausted air
The cfm is circulated back to the drum inlet 20 by fan 24.

Furthermore, approximately 100 cfm of ambient air from the air inlet 31 is returned longitudinally between the circumferential wall 14 and the compartment 22 through the screen 74 and radially to the drum air inlet 20. Pull. The mixture of air from the atmosphere and the recycled air is heated by burner 170 before being drawn by fan 24 through the air inlet 20 of the drum. The temperature of the air at the inlet of the drum is maintained at about 200°C to maximize the water vapor content of the air while preventing damage to the clothes as they dry.

From the above, it follows that more than 90% of the air entering the drum 12 is circulated air.

Circulating air at such a high rate over wet clothing means that once the temperature reaches steady state, the expelled air will be 135
It will have a lower dew point. On the other hand, if the air circulation rate is set to 50% as in the past, the dew point will be only 90-10.
It is 0°F. Therefore, the latent heat of vaporization that can potentially be recovered from the water vapor content of a given mass of exhaust air increases approximately four times by increasing the air circulation rate above 90%. This is especially important given the low exhaust installation of clothes dryers. More specifically, if the exhaust temperature is 167°C and the dew point is 135°F, how much enthalpy, or BTU, per pound of exhaust gas can be recovered from the latent heat of vaporization? d13
It is 9 BTU/lb. The enthalpy (mc7') recoverable from heat sensitivity is only 40 BTU/bond.

Therefore, the circulation rate of exhaust gas is increased. For example, a high enthalpy output exhaust can be used to heat water to high temperatures in heat exchanger 110, as described below.

Although the high circulation rate significantly increases the water vapor content of the circulated air, the drying time is not adversely affected due to the high air volume pumped into the drum 12. Furthermore, the high circulation rate does not require a proportional increase in burner input to maintain a constant air inlet temperature as the air flow increases.

If the air at the inlet of the drum consists of a mixture of 93% of the circulated air at 167°C and 3% of ambient air at 70°C, it takes 40°C to raise the temperature of the mixture to 200°C.
Only T below 0 is required. On the other hand, if the circulating air is 50 cm, a T of 80 or more is required.

Dryer 12 also has the advantage of more uniformly heating the trench inlet air. The mixture of circulated air and ambient air is raised to a relatively low T A? ″＞ttrx
The left eye is t-sho (le size entry) ``Aisugao is corrected ``1. Bite a little.

Another advantage of the dryer 12 is that its thermal mass is greatly reduced. Circulating air directly around the drum 12 eliminates the need for exhaust and circulation ducts. Furthermore, burner 170 provides fire directly to the mixture of ambient air and recirculated air, thereby eliminating the need for a separate burner box or heating chamber. Heat that would otherwise be wasted in heating the mass is utilized to evaporate moisture, increasing drying efficiency and reducing drying time.

The method of transferring heat from the exhaust gas to water using the condensing heat exchanger 110 will now be described with particular reference to FIGS. 2 and 6.

Blower 176 draws approximately 1109 C7 of exhaust air across the heat exchanger in parallel relationship therewith. During steady state or second stage drying, which will be discussed in more detail below, the exhaust air is at a temperature of about 167° C. and below and a dew point of about 135° C. below. Heat exchanger surface, area and approximately 1%
Combined with the water flow through pipe 114, the exhaust air at approximately 8 gpm
Cool to 0"F. Thus, both the heat and the heat of condensation are transferred from the exhaust to the water heating the water to about 125-1307.

This hot water is suitable for use directly in the washing machine.

On the other hand, if the exhaust dew point is a conventional 90-100°F, the water will reach a temperature of 80°F, which is inappropriate for the intended use.
It can only be preheated to 90'.

However, water at a temperature of 125-130' is only obtained when the temperature of the exhaust reaches steady state. This is illustrated in the graph of FIG. 7A, in which exhaust temperature, exhaust dew point, and output water temperature are plotted against drying time versus inlet air temperature. This graph shows three drying stages. During the first stage, the exhaust temperature and dew point rise rapidly as the thermal mass of the compartment, the drum 12, and the clothing within the drum reach steady state temperatures. The second stage exhibits relatively constant positioning and dew point when heat input balances evaporation in the wet garment with low circumferential losses. This stage is thus characterized by maximum removal of water from the garment at a relatively constant rate. During the third stage, the moisture that remains embedded within the fibers of the garment must first diffuse to the surface before it can be evaporated. Therefore, the third stage is characterized by slowing down the rate of moisture removal, increasing the exhaust temperature, and lowering the dew point of the exhaust.

The graph in Figure 7B shows the total enthalpy of the exhaust during the three drying stages. As previously mentioned, a large portion of the total exhaust enthalpy consists of water vapor enthalpy due to the relatively low temperature of the exhaust. Therefore, even though the exhaust temperature increases, the total enthalpy decreases during the third stage as the exhaust dew point decreases.

Since the temperature of the exiting water is directly related to the total enthalpy, the temperature of the water is highest only during the second stage of drying.

Therefore, for self-service washing machine applications, it may be desirable to connect a thermostatically controlled valve (not shown) to the water outlet. The valve allows water to flow through the system only when the water temperature is above a predetermined level.

Referring again to FIGS. 2 and 6, the flow of condensate through heat exchanger 110 will now be described. Condensation from the exhaust air cools the surrounding exhaust air below its dew point. The condensate flows down along fins 112 onto bed 102 and then drains through drain outlet 118Y. Thus, substantially the entire surface area of the fins 112 is covered with flowing condensate. The flowing condensate washes corrosive acids from the fins 112. When combined with the condensate of combustion gas water vapor, r=fi, acids such as carbonic acid and hydrofluoric acid are formed. Acid flushing is particularly effective because as the combustion gases flow all the way over the fins, some of the gases are absorbed by the aggregates. Therefore, minimal acidic condensate is formed on the top of the fins 112. This almost neutral condensate finally flows over the fin/112, so the more aggressive condensate is removed from the fin, leaving an almost neutral residue.
! Leave l.

Furthermore, by covering substantially the entire surface of the fins 112 with a film of condensate flowing down, condensate corrosion during the initial wetting of the fins is substantially eliminated. More specifically, when the exhaust air first contacts the cold surface of the fins 112 and the initial condensate is not covered by a film of one part of the fin, the initial condensate gradually evaporates and becomes more dense during the drying cycle. It condenses and becomes even more corrosive.

In addition to corrosion inhibition, the flowing condensate washes away small lint particles that pass through the lint screen 74. Over time, these small lint particles can clog the fins 112 and prevent heat recovery.

The removal and incineration of clothing lint are then explained in particular in Figures 2 and 3.
This will be explained with reference to the figures and FIG. Any air exhausted from the perforations 18 is drawn radially through the rotating screen 74 where the lint it entrains is deposited. Both the air-entrained lint and the lint trapped in the screen 74 are prevented from escaping between the rear wall 62 and the screen 74 by the seal 76. The captured lint is continuously incinerated as the screen 74 rotates under the downwardly directed flame of the burner 170.

Lint is rarely distributed on the screen 74 because the screen 740 circumference is relatively large, about 20 square feet for a standard 26 inch drum, and the lint is constantly burned off. Therefore, directly incinerating the lint with the burner 170 will break down the lint into its entirety. Ash or carbon residue hanging from the lint is therefore invisible.

If the lint is incinerated as described above, there is no need to manually clean up the lint. Also, if you don't, lint will gradually collect and obstruct the air flow, so it's important to check the performance of the dryer. There is no decline. These advantages are particularly important for commercial self-service washing machines where frequent lint cleaning is not performed. Furthermore, lint incineration does not require additional drive elements since the screen 74 rotates as the drum 12 rotates. Furthermore, it does not use the conventional ducting required to place the filter in close proximity to the user. This is another reason to keep dryer 10 compact and to minimize its thermal mass.

The dryer 10 is also convenient in that it significantly reduces drying time compared to conventional dryers without reducing drying efficiency. for example. Exhaust blower 156'Y750
By replacing the cfrs blower, the dryer 10 can be
Operated with 0% circulation and 1500 C/'m drum air inlet. This is approximately twice the drum inlet airflow and the same circulation rate as many conventional dryers. Assuming a drum air inlet temperature of 200°C or less, the second stage drying time is significantly reduced by allowing more drying air to flow over the garment.

From the above description, it is clear that dryer 10 provides high circulation without sacrificing drying efficiency or drying time.

With high circulation, you can use the hot water for the intended purpose.
The exhaust enthalpy is high enough to heat up. The high circulation also heats the air at the drum inlet more evenly, thereby increasing the temperature of the garment. Significantly reduces the chance of damaging the R fibers.

The dryer 10 also has low circulation speeds to significantly reduce drying time without sacrificing drying efficiency.

Furthermore, it eliminates the need for ducts for exhausting air, circulating air, and positioning a lint filter within easy reach of the user, eliminating the need for manual lint cleaning. Continuously incinerates lint. Prevents lint from accumulating on #i which obstructs airflow during the drying cycle.

Lint waste is incinerated without having to separate air circulation ducts or drive elements.

Although the dryer 10 has been described in detail with respect to preferred embodiments thereof, it is not intended that such details be limiting on the scope of the claims appended hereto. It will be apparent to those skilled in the art that various modifications and changes can be made without departing from the principles of the invention as illustrated in the accompanying drawings. Accordingly, what has been described above is illustrative and not limiting.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the dryer 10 shown mounted on a similar dryer 26, and FIG. 2 is a cross-sectional view of the dryer 10 taken along line 2-2 in FIG. Figure 3 is 3-3 of Copper Figure 2.
An enlarged cross-sectional view of a portion of FIG. 2 shown as a rough cut along the lines, and FIG. 4 shows the drum 12 and +! with the rear panel 40 removed.
Figure 5 is an elevational view of the rear of the dryer 10, with a portion cut away to show the drum 12 and the lint screen 74. 6 shows the rear wall 1 of the exhaust compartment 98 with a portion cut away to show the heat exchanger 110.
A diagram similar to Figure 4 showing a part of 06, Figure 7A is the exhaust 6
Graph of temperature versus time for degree, exhaust dew point and water temperature,
FIG. 7B is a graph of exhaust enthalpy versus time with the time axis aligned with FIG. 7A. DESCRIPTION OF SYMBOLS 10... Drying device, 12... Drum, 14... Circumferential wall, 16... Rear end, 18... Hole, 20... Air inlet, 22... Chamber, 24... Air moving means, 44.
... Door, 66 ... Exhaust outlet, 100 ... Condensing heat exchanger, 170 ... Burner 〇 (5 people in addition) Figure 3 Procedure amendment 1. Display of the case 1925 patent application No. ? Not, : Lg No. 2, Name of the invention n6 Prescription direction lnte hyo υ゛゛fan 56, Relationship with the case of the person making the amendment Patent applicant's address 硲(un (7g3) Lei, Gin 6〃 Nno S;-4, statement typed by agent

Claims (1)

[Scope of Claims] 1) A drum having a rear end having a circumferential wall with holes and an air inlet of the drum, and a circulation passageway between the holes and the air inlet of the drum and including the circumferential wall and the rear end. and means for moving air into the air inlet of the drum and exhausting it through said holes and drawing a portion of the exhausted air through a circulation passageway into the air inlet of the drum. Device. 2) The part of the discharged air is 8 of the discharged air.
2. The device of claim 1, comprising 0% or more. 3) The apparatus of claim 1 further comprising an ambient air inlet connected to the air inlet of the drum. 4) The device according to claim 1, further comprising an exhaust outlet connected to the circulation passage. 5) The apparatus of claim 4 further comprising means for discharging the remaining portion of the air from the air inlet of the drum through the exhaust outlet and from the air outlet of the drum through the exhaust hole. 6) The apparatus of claim 2, wherein the exhaust has a dew point of greater than 120°F. 7) It further comprises a chamber connected to the exhaust outlet and a condensing heat exchanger positioned within the chamber for heating a flowing fluid in heat exchange relationship with the exhaust gas, the fluid being able to absorb the sensed heat and the condensation heat from the exhaust gas. 6. The apparatus of claim 5, wherein the apparatus is heated by heat transfer both with and. 8) The device according to claim 1, further comprising a burner connected to the circulation channel. 9) A drum having an air inlet of the drum and at least one air outlet for discharging air, a circulation passage communicating between the air inlet of the drum and the air inlet, an exhaust passage communicating with the circulation passage, and an air passage. means for circulating a portion of the air from the air through the circulation passageway into the air inlet of the drum; means for discharging the remaining portion of the air from the circulation passageway through the exhaust passageway; and means positioned in the exhaust passageway for sensing heat and condensation from the exhaust air. and a condensing heat exchanger positioned generally perpendicular to the exhaust passageway, the condensing heat exchanger transferring both heat and heat to a liquid flowing through the heat transfer means, the condensing heat exchanger being positioned generally perpendicular to the exhaust passageway and having exhaust condensate flowing therethrough. Clothes drying equipment. 10) a garment drum having a circumferential wall having a plurality of air outlet holes and an end wall having an air inlet; a casing forming an air passage therebetween; and a casing for moving air into the air inlet and exhausting it radially through the air outlet hole, and causing a portion of the air discharged from the outlet hole to flow axially through the passage and then into the air inlet. and means for circulating the air back in the radial direction. 11) The apparatus of claim 10 further comprising an exhaust vent connected to the air passage and means for discharging the remainder of the exhausted air through the exhaust vent. 12) further comprising a chamber connected to the exhaust vent and a condensing heat exchanger having at least one conduit positioned within the chamber through which the exhaust air flows, the conduit including a water passageway through which water flows; 12. The apparatus of claim 11, wherein the water is heated by heat transfer between the heat from the exhaust gas and the heat of condensation released as condensate from the exhaust gas onto a condensing heat exchanger. 13) A clothes drum having a front opening, a rear end with an air inlet and a circumferential wall with holes, a door sealing the front opening, and a door surrounding the rear end and the circumferential wall at a distance from the circumferential wall. an encapsulation forming an air passage from the perforation lengthwise along the rear end and radially along the rear end and back to the drum outlet; a heater positioned in the air passage; and an ambient air inlet communicating with the air passage. a fan positioned at the inlet of the drum for circulating air from the passageway through the drum, the fan pumping air into the drum and radially discharging it through the perforations and into the passageway across the heater and through the drum. Clothes drying apparatus characterized in that the drum is drawn longitudinally back to the inlet of the drum and across the heater from the ambient air inlet to the drum. 14) A condensing heat exchanger further comprising an exhaust outlet connected to the air passage, a housing connected to the exhaust outlet, and at least one conduit positioned within the housing through which heated water flows; means for drawing the remaining part of the air through the exhaust passage and over the condensing heat exchanger, the water being heated by heat sensitivity and heat transfer with the heat of condensation from the air flowing over the condensing heat exchanger. Apparatus according to item 13 within the scope of 15) The device according to claim 14, wherein the air drawing means comprises a blower. 16) The apparatus of claim 13, wherein the means for circulating comprises at least 80% of the air entering the inlet of the drum. 17) The apparatus of claim 16, wherein the discharged air has a dew point of at least 120°F. 18) a cabinet having an opening for receiving garments; a garment drum having a front opening communicating with the opening of the cabinet; a rear end containing an air inlet of the drum; and a perforated circumferential wall; means for rotating the drum; and a rear part of the drum. an air circulation path continuous with the circumferential wall and rear end of the drum and formed by the space between the housing and the circumferential wall and rear end of the drum; an ambient air inlet connected to the circulation path; and an ambient air inlet positioned at the air inlet of the drum to force air into the drum and exhaust it radially through holes in the drum, and to direct a portion of the exhausted air through the circulation path. a fan for drawing ambient air back into the drum air inlet along the length of the drum and from the ambient air inlet into the drum inlet; a heater positioned in the circulation path; an exhaust outlet connected to the circulation path; an exhaust blower connected to the outlet for exhausting air from the drum by drawing the remainder of the exhaust from the circulation path through the exhaust outlet. 19) The apparatus of claim 18, wherein the drum is positioned within the cabinet with a downward slope from the front opening to the rear end. 20) It also includes a chamber connected to an exhaust blower and a condensing heat exchanger consisting of a tube and fin heat exchanger positioned within the chamber, the fins being positioned approximately vertically within the chamber and the exhaust gas being directed upward along the fins. It forms a downward flow path through which the water to be heated flows downward through the tube, and the water is heated by heat transfer between the heat sensitivity from the exhaust and the heat of condensation released as condensate from the exhaust forms on the fins. 19. The apparatus of claim 18, wherein the apparatus is heated and causes condensate to flow down the fins in a direction generally opposite to the flow of the exhaust air. 21) The apparatus of claim 18, wherein the circulated air comprises at least 80% of the air entering the air inlet of the drum. 22) The apparatus of claim 18, wherein the dew point of the exhaust gas is greater than or equal to 120°F. 23) The apparatus of claim 18, wherein the heater comprises a gas burner. 24) The apparatus of claim 18, wherein the heater comprises an electrical heating element. 25) The apparatus of claim 18, wherein the rotating means comprises a motor connected to the drum. 26) The apparatus of claim 25, wherein the motor is also connected to an exhaust blower. 27) The apparatus of claim 25, wherein the motor is also connected to a fan. 28) Pumping air into the drum to evaporate moisture from the clothes in the drum, expelling the air from the drum, circulating at least 80% of the expelled air back into the drum, and recirculating the remainder of the expelled air. heating the water in the condensing heat exchanger, characterized in that the part is pumped across the condensing heat exchanger through which the water is flowing, and the heat sensitivity and the condensation heat of the remaining part of the discharged air are transferred to the water. This method increases the energy per unit mass of the exhaust air from the dryer. 29) Pumping air axially into the drum, exhausting the air and air radially from the drum, and continuously circulating a portion of the exhausted air around the circumferential wall of the drum axially back into the drum. A method of drying clothes in a drum characterized by: